last year. but today's anger was directed at the new president, morsi. nbc's ayman mohyeldin is in tahrir square for us tonight. good evening, ayman. >> reporter: good evening, brian. hundreds of thousands of protesters were back here in tahrir square angry with president morsi for granting himself new powers. police used tear gas and rubber bullets, killing two protesters and injuring hundreds more. beyond the square, muslim brotherhood offices were attacked. the president is trying to diffuse the crisis, cancelling a rally by supporters. and promising to use his new powers in a limited way. people here don't believe him, in fact, it's only galvanized the opposition, who say president morsi is betraying the revolution becoming another mubarak, they vowed to stay here until morsi rescinds his decree. brian? >> ayman mohyeldin above tahrir square for us tonight, ayman, thanks. >>> also in the middle east today, they took an extraordinary step to investigate an old rumor. they dug up the body of yasser arafat to see if he had been poisoned, and they're conducting tissue samples